Results 11 to 20 of about 1,168,224 (184)
Conservation Biology, EarlyView.Abstract Adaptive management of threatened species relies on having ex ante estimates of species’ responses to different interventions. Structured expert elicitation is often used to generate these estimates, but comparisons of these expert‐predicted outcomes with observed results are rare.
Helen J. Mayfield +18 more
wiley +1 more source
, 2016 有性生殖的关键过程是通过减数分裂产生生殖细胞,而减数分裂的一个重要环节是进行基于DNA双链断裂的同源染色体重组。在同源染色体重组过程中,SPO11蛋白催化产生DNA双链断裂,从而起始同源染色体的重组。因此,研究SPO11基因缺失在减数分裂过程中所引起的基因表达变化有助于在转录组水平上了解该基因的作用。本研究通过对嗜热四膜虫(Tetrahymena thermophila)野生型和SP011敲除细胞株在接合生殖时期2 h、3 h、4 h、5 h四个时间点的转录组进行高通量测序 ...
闫冠雄 +5 more
core +1 more source
Zhongguo shiyan zhenduanxue, 2019 目的基于等位基因特异性PCR(allele-specific PCR,AS-PCR)原理,建立一种QPCR检测CLU基因与阿尔兹海默病(AD)相关性SNP位点基因型的筛选方法。方法根据CLU基因上的rs11136000,rs2279590和rs9331888 3个SNP位点设计特异性的野生型、突变型引物,使用实时荧光定量PCR(QPCR)对AD患者外周血样本进行SNP基因分型,以DNA基因测序法结果作为参考标准。结果 10例样本的QPCR定量分型结果显示 ...
李逸豪 +8 more
doaj
Zhongguo shiyan zhenduanxue, 2021 目的 研究院内MDRAB相关耐药基因及分子流行病学特征,为抗菌药物合理使用及医院感染控制提供依据。方法 对2019年2月至2019年10月间院内分离的15株MDRAB用多位点序列分型（MLST）鉴定菌株之间的亲缘关系,PCR法检测β-内酰胺类耐药基因、质粒介导的喹诺酮类耐药基因、氨基糖苷类耐药基因及消毒剂qacE△1基因。结果 MLST分析发现15株MDRAB有ST195（46.7%）、ST369（20%）、ST208（13.3%）、ST368（13.3%）和ST540（6.7%）5个序列类型 ...
姜梅杰 +4 more
doaj
Subspecies taxonomy reflects social and geographic patterns of taxonomic effort in tetrapods
Conservation Biology, EarlyView.Abstract Subspecies have been used in conservation biology to account for intraspecific patterns in genetic diversity, which is crucial to long‐term population viability. Although over 3200 subspecies are currently assessed by the International Union for Conservation of Nature Red List, their biological relevance remains controversial.
Jhonny J. M. Guedes +3 more
wiley +1 more source
, 2005 以原癌基因Kras基因12位密码子的4种基因型(野生型为GGT,突变型为AGT、TGT、CGT)质粒DNA为研究模型,采用SYBRGreenⅠ为实时PCR指示剂,进行ARMS实时PCR基因分型特异性的研究.结果表明:在和模板匹配的ARMS引物3′端附近引入故意错配碱基,将ARMS引物浓度稀释10倍,并对传统三步PCR循环进行改良,即根据目的产物和引物二聚体的熔点差异,在传统延伸步骤之后增加一步恒温80℃检测荧光步骤,可消除引物二聚体的影响,使ARMS引物的特异性增强,得到清晰的基因分型结果 ...
郑薇薇, 梁基选, 李庆阁
core
Zhongguo shiyan zhenduanxue, 2007 目的评价基因芯片技术在HBV基因型及HBVP基因YMDD变异检测中的应用价值,并对不同基因型病例的临床情况进行分析。方法抽提HBV DNA,用PCR方法扩增S基因及P基因部分区域,扩增产物与基因芯片上的寡核苷酸探针进行杂交,杂交结果通过芯片影像读取仪扫描到计算机上,经软件分析可得到HBV基因型、HBVYMDD野生型及YVDD、YIDD变异型结果;部分标本通过HBV preS/S基因序列测序证实。结果38份高病毒滴度标本（HBV DNA定量>1.0×105拷贝/毫升）中22例为B基因型（58 ...
陈伟烈 +5 more
doaj
How endorser attributes influence conservation communication
Conservation Biology, EarlyView.Abstract Conservation communication often uses the celebrity endorsement strategy. However, robust evidence regarding its effectiveness is still limited. More importantly, practitioners do not have guidelines for selecting an ideal endorser because there is no clear consensus on what endorser attributes are most critical.
Xia He, Tien Ming Lee
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2015 目的调查疾病易感性相关的髓过氧化酶（MPO）、人类8-羟基鸟嘌呤糖苷酶（hOGG1）、锰超氧化物歧化酶（MnSOD）基因多态性在韩国人群中的分布状况。方法采用聚合酶链式反应-限制性片段长度多态性（PCR-RFLP）技术分别分析300名韩国健康男女大学生的MPO基因启动子区-463bp位点、hOGG1基因第7外显子第1245位碱基C/G、MnSOD基因1183位点T/C的单核苷酸多态性—M-4,计算基因型和基因频率。结果 MPO基因型频率为G/G型80.3%、G/A型19.0%、A/A型0.7 ...
卢焕俊, 洪润哲, 许青松
doaj
Learning Styles, Engagement and Anxiety in AI‐Mediated Writing: A Multimodal Feedback Study
International Journal of Applied Linguistics, EarlyView.ABSTRACT Artificial intelligence (AI) tools now permeate English academic writing. However, evidence on how feedback modalities align with student differences and with psychological mechanisms remains limited. Prior work often reduced learning styles to simple matches with delivery modes and treated learning engagement and writing anxiety as peripheral.
Yi Ren +3 more
wiley +1 more source